H3C Technologies H3C WX3000E Series Wireless Switches User Manual
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Pin
10Base-T/100Base-TX
1000Base-T
Signal Function
Signal
Function
6 Rx-
Receives
data
BIDB-
Bi-directional data cable B-
7 Reserved
N/A BIDD+ Bi-directional data cable D+
8 Reserved
N/A BIDD- Bi-directional data cable D-
Table 22 RJ-45 MDIX port pinouts
Pin
10Base-T/100Base-TX
1000Base-T
Signal Function
Signal
Function
1 Rx+
Receives
data
BIDB+
Bi-directional data cable B+
2 Rx-
Receives
data
BIDB-
Bi-directional data cable B-
3
Tx+
Sends data
BIDA+
Bi-directional data cable A+
4 Reserved
N/A BIDD+ Bi-directional data cable D+
5 Reserved
N/A BIDD- Bi-directional data cable D-
6
Tx-
Sends data
BIDA-
Bi-directional data cable A-
7
Reserved
N/A
BIDC+
Bi-directional data cable C+
8 Reserved
N/A BIDC- Bi-directional data cable C-
To ensure normal communication, the pins for sending data on one port
must correspond to the pins for receiving data on the peer port. When
both of the ports on the two devices are MDI or MDIX, use a crossover
Ethernet cable; when one port is MDI and the other is MDIX, use a
straight-through Ethernet cable. To summarize, straight-through and
crossover cables connect the following devices:
•
Straight-through cables connect devices of different types—for example,
router to PC and router to switch.
•
Crossover cables connect devices of the same type—for example, switch
to switch, router to router, and PC to PC.